May 21 marks a sad day in the history of Indian politics. A day that will never be forgotten. On this day, twenty-nine years back, former prime minister and stalwart Congress leader Rajiv Gandhi was assassinated during an election campaign in the year 1991. Prime Minister Narendra Modi paid tribute to the late leader. He took to twitter and wrote, " On his death anniversary, tributes to former prime minister Shri Rajiv Gandhi."